CMB and reheating constraints to α-attractor inflationary models

被引：51
作者：
Eshaghi, Mehdi [1 ,2 ]
Zarei, Moslem [3 ,4 ]
Riazi, Nematollah [5 ]
Kiasatpour, Ahmad [1 ]
机构：
[1] Univ Isfahan, Fac Sci, Dept Phys, Esfahan 8174673441, Iran
[2] SISSA, Astrophys Sect, Via Bonomea 265, I-34136 Trieste, Italy
[3] Isfahan Univ Technol, Dept Phys, Esfahan 8415683111, Iran
[4] Inst Res Fundamental Sci IPM, Sch Astron, POB 19395-5531, Tehran, Iran
[5] Shahid Beheshti Univ, Dept Phys, Tehran 19839, Iran
来源：
PHYSICAL REVIEW D | 2016年 / 93卷 / 12期
关键词：
D O I：
10.1103/PhysRevD.93.123517
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
After Planck 2013, a broad class of inflationary models called alpha-attractors was developed which has universal observational predictions. For small values of the parameter alpha, the models have good consistency with the recent cosmic microwave background data. In this work, we first calculate analytically ( and verify numerically) the predictions of these models for spectral index, n(s), and tensor-to-scalar ratio, r, and then, using BICEP2/Keck 2015 and Planck 2015 data, we impose constraints on alpha-attractors. Then, we study the reheating for alpha-attractors. The reheating temperature, T-re, and the number of e-folds during reheating, N-re, are calculated as functions of n(s). Using these results, we determine the range of the free parameters of two classes of alpha-attractors which satisfy the constraints of recent cosmic microwave background data.
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页数：11
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